| 摘要 |
<p>A mechanically flexible and environmentally stable organic electroluminescent ('EL') device with directional light emission comprises an organic EL member (20) disposed on a flexible substrate (40), a surface of which is coated with a multilayer barrier coating (50) which includes at least one sublayer of a substantially transparent organic polymer (52) and at least one sublayer of a substantially transparent inorganic material (54). The device includes a reflective metal layer (60) disposed on the organic EL member (20) opposite to the substrate (40). The reflective metal layer (60) provides an increased external quantum efficiency of the device. The reflective metal layer (60) and the multilayer barrier coating (50) form a seal around the organic EL member (20) to reduce the degradation of the device due to environmental elements.</p> |
